package net.minecraft.world.gen.feature;

import java.util.Random;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.block.state.IBlockState;
import net.minecraft.init.Blocks;
import net.minecraft.util.BlockPos;
import net.minecraft.world.World;

public class WorldGenShrub extends WorldGenTrees {
	private final IBlockState leavesMetadata;
	private final IBlockState woodMetadata;

	public WorldGenShrub(IBlockState p_i46450_1_, IBlockState p_i46450_2_) {
		super(false);
		this.woodMetadata = p_i46450_1_;
		this.leavesMetadata = p_i46450_2_;
	}

	public boolean generate(World worldIn, Random rand, BlockPos position) {
		Block block;

		while (((block = worldIn.getBlockState(position).getBlock()).getMaterial() == Material.air
				|| block.getMaterial() == Material.leaves) && position.getY() > 0) {
			position = position.down();
		}

		Block block1 = worldIn.getBlockState(position).getBlock();

		if (block1 == Blocks.dirt || block1 == Blocks.grass) {
			position = position.up();
			this.setBlockAndNotifyAdequately(worldIn, position, this.woodMetadata);

			for (int i = position.getY(); i <= position.getY() + 2; ++i) {
				int j = i - position.getY();
				int k = 2 - j;

				for (int l = position.getX() - k; l <= position.getX() + k; ++l) {
					int i1 = l - position.getX();

					for (int j1 = position.getZ() - k; j1 <= position.getZ() + k; ++j1) {
						int k1 = j1 - position.getZ();

						if (Math.abs(i1) != k || Math.abs(k1) != k || rand.nextInt(2) != 0) {
							BlockPos blockpos = new BlockPos(l, i, j1);

							if (!worldIn.getBlockState(blockpos).getBlock().isFullBlock()) {
								this.setBlockAndNotifyAdequately(worldIn, blockpos, this.leavesMetadata);
							}
						}
					}
				}
			}
		}

		return true;
	}
}
